Valve



Nov. 4, 1930. R. w. LEACH ET AL 1,780,160

. VALVE Filed Jam 17, 1929 2 Sheets-Sheet l i929 2 Sheets-Shes*l 2 R. w.LEACH ET AL VALVE Filed Jan.

- Nov. 4, 1930.

Patented Nov. 4, 1930 UNITED STATES:

PATENT OFFICE ROBERT WILLIAM LEACH AND WILLIAM HENRY BATEMAN, F NEWPORT,ENGLAND VALVE Application led January 17, 1929, Serial No. 333,073, andin Great Britain January 21, 1928.

This invention relates to valves of the kind proved means forlubricating the contactingV surfaces of the iixed and movable parts andfor maintaining a Huid tight joint between the said parts.

The. invention comprises the provision in the fixed and movable parts,of lubricant distributing channels which are so formed or arranged as tosurround the aperture through the valve when the latter is opened orclosed, provision being also made to interrupt the supply of viscouslubricant under pressure to some of the passages when the latter areexposed during the movement of the cylindrical member. In the twoaccompanying sheets of explanatory drawings a Figure 1 is a' sectionalside elevation of a cylindrical valve provided with lubricating i meansin accordance with this invention, the

valve being shown closed.

Figure 2 is a. cross section of a portion of the valve on the line 1, 2,Figurel.

Figure 3 is a sectional side elevationl ot ,the lower portion of thevalveat right angles to theplane of section of Figure l. Figure 4 is asectional side elevation similar to Figure l and showing the upper partof the valve, VVthe valve being open. .l

In carrying the invention into effect as shown, the movable member a ofthe valve is made of cylindrical form and is arranged to slide axiallywithina suitable body part .22. Within the body part a lubricantreservoir c is provided and the lubricant therein 4Q is pu`t underpressure by means of a piston d which is acted upon by a spring d orpressure fluid. .Lubricant iiows from this chamber througha hole e intolongitudinal grooves f formed along the exterior and on opposite sidesof the movable member a and arranged to terminate at their upper end ina circumferential groove g inthe body part and at their llower end in acircumferential groove 71. in the movable member. The longitudinalgrooves j are connected together by source of pressure.

'fthe laterare not expose a distributing passage c' formed diametricallyacross the cylindrical member. Adjacent to the ,transverse distributingpassage z' in the movable member, circumferential grooves y' are alsoformed around the -movable member, but these do Vnot completely surroundthe said member. At their ends they communicate with and supplylubricant to relatively short grooves c in the body part. When the valveis closed as shown in Figure 1 the aperture through the valve iscompletely surrounded by lubricant under pressure, and all the groovesand channels are in communication with the reservoir. During themovement of the valve to the open position (Figure 4) the intermediatecircumferential, grooves j which donot completely surround the movablemember pass out of communication with the body grooves lc and arethereby cut ofi' from the Consequently, during the interval in whichthese grooves are exposed, there is no material leakage of lubricantfrom them. When the valve is fully open communication is reestablishedthrough the upper groove g as shown in Figure 4.

To prevent rotation of the part a its up' per end is provided with apair of key like projections Z (Figures 1 and 4) engaging grooves m inthe body part, the grooves being located in as lane at right anglestothat containing the ubricant rooves 7 so that dlr when `the valve partis'raised to the upper position. As regards the piston al, the stem nmay be made hollow to receive the charge of lubricant,

the aperture being closed at its outer end by a plug 0. A fitting pcontainin a nonreturn valve may be provided at t e inner end of thestem.

are as above described, Also the position of the lubricant reservoir,and' the means for applying pressure may be varied.

Having thus described our invention what we claim as new and desire tosecure by Let- 1.`In a valve, a body part having a passage, acylindrical member slidable axially within said body part, the body partand cylindrical member having adjacent Work- 5 ing faces, lubricantdistributing channels in the body part and cylindrical member, saidchannels surrounding the valve passage, and means for'supplyinglubricant to the channels underv pressure, certain of the channels 1omoving out of communication with other channels when the movable memberis moved from one position to another.

,2. In a valve, a body part having a passage, a cylindrical memberslidable axially within said bodv pa.rt,'the body part and cylindricalmemberyhaving adjacent Working faces, a circumferential groove and apair of segmental grooves located at different points on the Workingface of the body part, and longitudinal, circumferential and segmentalgrooves in the cylindrical member, and means for supplying thegrooveswith v lubricant under pressure, the various grooves surrounding thepassage and interrupting the supply of lu ricant to the segmental oovesin the slidable part when the latter 1s being moved from one position toanother. In testimony whereof We have signed our 'names to thisspecification. ROBERT WILLIAM LEACH.

WILLIAM HENRY BATEMAN.

